/*
ACM中比较常见，其功能是循环从输入流读取m和n，直到遇到EOF为止，等同于while (scanf("%d%d",&m,&n)!=EOF)。

　　scanf()函数返回成功赋值的数据项数，出错时则返回，EOF定义为-1。~是按位取反，-1十六进制补码表示为0x ffffffff，f是二进制的1111，取反后就全部变成0了，于是while结束。只有返回值为EOF（即-1）时，其取反的的值（即while循环的判断条件）才为0，才能结束循环，其它输入情况下（无论是否输入成功）while循环的判断条件为非0，即为真。

　　这种写法的漏洞在于：一但输入的值为字母、符号之类的，scanf赋值不成功把读到的内容又返回到stdin的缓冲区（假设这个值为t），其取反得到的值使while又进入到下一次循环，scanf又从stdin缓冲区里读到了原先吐回的t，如此成了死循环
*/


/*
// 此算法超时
#include<stdio.h>

int is_prime(int x){  
	int i;
	if(x<=1)  
		return 0;
	for( i=2;i*i<=x;i++)
		if(x%i==0)   	
			return 0;
		return 1;
}

int change(int y){ 
	int s=0;

	while(y){
		s=s*10+y%10;
		y/=10;
	}

	return s;
}

int main()
 {
	int a,b;
	int i;
	while(scanf("%d%d",&a,&b)!=EOF){
		for(i=a;i<=b;i++){
			if(is_prime(i)&&change(i)==i)
				printf("%d\n",i);
		｝	
		printf("\n");
	｝
	return 0;
} 
*/

/*
// 此算法超内存：5 －－　100,000,000 之间最大的回文数就是9989899，故此数组开到9989899稍大就行
#include<stdio.h>  
int a[9999899]={0};

int change(int y){
	int s=0;
	int t=y;

	while(y){
		s=s*10+y%10;
		y/=10;
	}
	return s==t;
}

int main()
{
	int i,j;
	int x,y;
	a[1]=1;
	a[0]=1;

	for(i=2;i<=9989899;i++){
		if(!a[i]){  
			for(j=i+i;j<=9989899;j+=i)
				a[j]=1;
		}
	}  	 
    	 
	while(scanf("%d%d",&x,&y)!=EOF){  
		if(y>9989899)   
			y=9989899;
	
		for(i=x;i<=y;i++){
			if(!a[i]&&change(i))
				printf("%d\n",i);
		} 
		printf("\n");
	}
      return 0;
}
*/


/*
#include<stdio.h>  

bool a[9999899]={0};

int change(int y){ 
	int s=0;
	int t=y;
      	
	while(y){
		s=s*10+y%10;
		y/=10;
	}
	return s==t;
}
  
int main()
{
	int i,j;
	int x,y;
	a[1]=1;
	a[0]=1;

	for(i=2;i<=9989899;i++){
		if(!a[i]){  
			for(j=i+i;j<=9989899;j+=i)
			a[j]=1;
		}
	}  	 
    	 
	while(scanf("%d%d",&x,&y)!=EOF){  
		if(y>9989899)   
			y=9989899; //同时注意此处y的值可能大于9989899

		for(i=x;i<=y;i++){
			if(!a[i]&&change(i))
				printf("%d\n",i);
		} 
		printf("\n");
	}
	return 0;
}
*/

// 暴力解法
#include<stdio.h> 
#include<string.h> 

int a[781]={ 2,3,5,7,11,101,131,151,181,191, 313,353,373,383,727,757,787,797,919,929, 10301,10501,10601,11311,11411,12421,12721,12821,13331,13831, 13931,14341,14741,15451,15551,16061,16361,16561,16661,17471, 17971,18181,18481,19391,19891,19991,30103,30203,30403,30703, 30803,31013,31513,32323,32423,33533,34543,34843,35053,35153, 35353,35753,36263,36563,37273,37573,38083,38183,38783,39293, 70207,70507,70607,71317,71917,72227,72727,73037,73237,73637, 74047,74747,75557,76367,76667,77377,77477,77977,78487,78787, 78887,79397,79697,79997,90709,91019,93139,93239,93739,94049, 94349,94649,94849,94949,95959,96269,96469,96769,97379,97579, 97879,98389,98689,1003001,1008001,1022201,1028201,1035301,1043401,1055501, 1062601,1065601,1074701,1082801,1085801,1092901,1093901,1114111,1117111,1120211, 1123211,1126211,1129211,1134311,1145411,1150511,1153511,1160611,1163611,1175711, 1177711,1178711,1180811,1183811,1186811,1190911,1193911,1196911,1201021,1208021, 1212121,1215121,1218121,1221221,1235321,1242421,1243421,1245421,1250521,1253521, 1257521,1262621,1268621,1273721,1276721,1278721,1280821,1281821,1286821,1287821, 1300031,1303031,1311131,1317131,1327231,1328231,1333331,1335331,1338331,1343431, 1360631,1362631,1363631,1371731,1374731,1390931,1407041,1409041,1411141,1412141, 1422241,1437341,1444441,1447441,1452541,1456541,1461641,1463641,1464641,1469641, 1486841,1489841,1490941,1496941,1508051,1513151,1520251,1532351,1535351,1542451, 1548451,1550551,1551551,1556551,1557551,1565651,1572751,1579751,1580851,1583851, 1589851,1594951,1597951,1598951,1600061,1609061,1611161,1616161,1628261,1630361, 1633361,1640461,1643461,1646461,1654561,1657561,1658561,1660661,1670761,1684861, 1685861,1688861,1695961,1703071,1707071,1712171,1714171,1730371,1734371,1737371, 1748471,1755571,1761671,1764671,1777771,1793971,1802081,1805081,1820281,1823281, 1824281,1826281,1829281,1831381,1832381,1842481,1851581,1853581,1856581,1865681, 1876781,1878781,1879781,1880881,1881881,1883881,1884881,1895981,1903091,1908091, 1909091,1917191,1924291,1930391,1936391,1941491,1951591,1952591,1957591,1958591, 1963691,1968691,1969691,1970791,1976791,1981891,1982891,1984891,1987891,1988891, 1993991,1995991,1998991,3001003,3002003,3007003,3016103,3026203,3064603,3065603, 3072703,3073703,3075703,3083803,3089803,3091903,3095903,3103013,3106013,3127213, 3135313,3140413,3155513,3158513,3160613,3166613,3181813,3187813,3193913,3196913, 3198913,3211123,3212123,3218123,3222223,3223223,3228223,3233323,3236323,3241423, 3245423,3252523,3256523,3258523,3260623,3267623,3272723,3283823,3285823,3286823, 3288823,3291923,3293923,3304033,3305033,3307033,3310133,3315133,3319133,3321233, 3329233,3331333,3337333,3343433,3353533,3362633,3364633,3365633,3368633,3380833, 3391933,3392933,3400043,3411143,3417143,3424243,3425243,3427243,3439343,3441443, 3443443,3444443,3447443,3449443,3452543,3460643,3466643,3470743,3479743,3485843, 3487843,3503053,3515153,3517153,3528253,3541453,3553553,3558553,3563653,3569653, 3586853,3589853,3590953,3591953,3594953,3601063,3607063,3618163,3621263,3627263, 3635363,3643463,3646463,3670763,3673763,3680863,3689863,3698963,3708073,3709073, 3716173,3717173,3721273,3722273,3728273,3732373,3743473,3746473,3762673,3763673, 3765673,3768673,3769673,3773773,3774773,3781873,3784873,3792973,3793973,3799973, 3804083,3806083,3812183,3814183,3826283,3829283,3836383,3842483,3853583,3858583, 3863683,3864683,3867683,3869683,3871783,3878783,3893983,3899983,3913193,3916193, 3918193,3924293,3927293,3931393,3938393,3942493,3946493,3948493,3964693,3970793, 3983893,3991993,3994993,3997993,3998993,7014107,7035307,7036307,7041407,7046407, 7057507,7065607,7069607,7073707,7079707,7082807,7084807,7087807,7093907,7096907, 7100017,7114117,7115117,7118117,7129217,7134317,7136317,7141417,7145417,7155517, 7156517,7158517,7159517,7177717,7190917,7194917,7215127,7226227,7246427,7249427, 7250527,7256527,7257527,7261627,7267627,7276727,7278727,7291927,7300037,7302037, 7310137,7314137,7324237,7327237,7347437,7352537,7354537,7362637,7365637,7381837, 7388837,7392937,7401047,7403047,7409047,7415147,7434347,7436347,7439347,7452547, 7461647,7466647,7472747,7475747,7485847,7486847,7489847,7493947,7507057,7508057, 7518157,7519157,7521257,7527257,7540457,7562657,7564657,7576757,7586857,7592957, 7594957,7600067,7611167,7619167,7622267,7630367,7632367,7644467,7654567,7662667, 7665667,7666667,7668667,7669667,7674767,7681867,7690967,7693967,7696967,7715177, 7718177,7722277,7729277,7733377,7742477,7747477,7750577,7758577,7764677,7772777, 7774777,7778777,7782877,7783877,7791977,7794977,7807087,7819187,7820287,7821287, 7831387,7832387,7838387,7843487,7850587,7856587,7865687,7867687,7868687,7873787, 7884887,7891987,7897987,7913197,7916197,7930397,7933397,7935397,7938397,7941497, 7943497,7949497,7957597,7958597,7960697,7977797,7984897,7985897,7987897,7996997, 9002009,9015109,9024209,9037309,9042409,9043409,9045409,9046409,9049409,9067609, 9073709,9076709,9078709,9091909,9095909,9103019,9109019,9110119,9127219,9128219, 9136319,9149419,9169619,9173719,9174719,9179719,9185819,9196919,9199919,9200029, 9209029,9212129,9217129,9222229,9223229,9230329,9231329,9255529,9269629,9271729, 9277729,9280829,9286829,9289829,9318139,9320239,9324239,9329239,9332339,9338339, 9351539,9357539,9375739,9384839,9397939,9400049,9414149,9419149,9433349,9439349, 9440449,9446449,9451549,9470749,9477749,9492949,9493949,9495949,9504059,9514159, 9526259,9529259,9547459,9556559,9558559,9561659,9577759,9583859,9585859,9586859, 9601069,9602069,9604069,9610169,9620269,9624269,9626269,9632369,9634369,9645469, 9650569,9657569,9670769,9686869,9700079,9709079,9711179,9714179,9724279,9727279, 9732379,9733379,9743479,9749479,9752579,9754579,9758579,9762679,9770779,9776779, 9779779,9781879,9782879,9787879,9788879,9795979,9801089,9807089,9809089,9817189, 9818189,9820289,9822289,9836389,9837389,9845489,9852589,9871789,9888889,9889889, 9896989,9902099,9907099,9908099,9916199,9918199,9919199,9921299,9923299,9926299, 9927299,9931399,9932399,9935399,9938399,9957599,9965699,9978799,9980899,9981899, 9989899 }; 

int main() 
{ 
	int x,y,i; 
	while(~scanf("%d%d",&x,&y)) { 
		for(i=0;i<781;i++) { 
			if(a[i]>=x&&a[i]<=y) 
				printf("%d\n",a[i]); 
		} 
	printf("\n"); 
	} 
	
	return 0; 
}



